There are plenty of prior questions on For Sale By Owners - commonly known as FSBO- I would suggest reading them for pointers, first. Here's a link to start you off on your search.
if you're still here on voices, i'm curious to know how it turned out. was the flip tax on the profit [difference between the price you bought it for and the current contract selling price?]
you have choices....
Is your flip tax really 17.5% of your sale price? Can that fee be negotiated if you get interest from mulitiple buyers? You may want to start with a written explanation of why it is so out of whack. Standard flip-tax is 2% of the purchase price paid by the seller.
Maybe you should consider taking a few weeks to try to sell it on your own, if it doesn't work, call a professional. I'd be happy to help. email@example.com